/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineUserInterface.h
Called when done querying for UserId mappings from external ids
typedef TBaseDelegate_FiveParams< void, bool, const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) &, const [FExternalIdQueryOptions](API\Plugins\OnlineSubsystem\Interfaces\FExternalIdQueryOptions) &, const [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > &, const [FString](API\Runtime\Core\Containers\FString) & > FOnQueryExternalIdMappingsComplete